These should be good range mags if they have steel reinforced feedlips,... I've had good performance in 9mm glocks from the "Made in Korea" mags, and from Magpuls. Agree with others however that only OEM should be used for personal carry.
"Good enough" in terms of function is not the only issue for civilian carry. It is widely believed that use of aftermarket parts and modifications other than, say night sights -- no matter how functionally practical they may be -- can be manipulated by opposing legal counsel to weaken legal defense in the hopefully unlikely event that armed self-defense results in the self-defender facing legal charges. Hence best to stick with OEM mags for carry.Seems they are good enough for the military! I carry my G26 with their Pmag12. Never had an issue with them.
I’d rather use that, then a +2 extension
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